Weather stripping



March 30, 1943. A. A. GUILLAUME WEATHER STRIPPING Filed Aug. 3, 1940 2 Sheets-Sheet 1 March 30, 1943.

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Patented Mar. 30, 1943 WEATHER STRIPPING Anton A. Guillaume, La Crosse, Wis., assigner to Segelke & Kohlhaus Company, La Crosse, Wis., a corporation of Wisconsin Application August 3, 1940, `Serial No. 350,266

' (C1. zei-69) 1 Claim.

My invention relates to weather stripping, and especially weather stripping for double-hung windows to seal their lateral edges along the parting stop.

Among the objects of my invention is such a weather strip which i-s simple and economical to manufacture, is readily installed, requires a minimum of attachment, which does not substantially complicate the removal f either or both sash, which maintains an elective seal, including a sealing of the parting stop to the ends of the meeting rails of the sash, and which does not require that the parting stop be attached to thenframe.

The foregoing, together with further objects, features and advantages of my inventiornare set forth in the following` description of a-specic embodiment thereof and illustrated in the accompanying drawings, wherein:

Fig. 1 is a horizontal section of the left (assuming one is looking toward the outdoors) side of a window frame and sash at the plane of the top of the lower sash, wherein the window is equipped with the weather stripping of my invention;

Fig. 2 is a vertical section in the plane of the window taken along the weather strip slot in the lower sash and looking outwardly, which may be considered as taken on the line 2-2 of Fig. l;

Fig. 3 is a greatly enlarged section of the three intertting component pieces of the weather stripping;

Fig. 4 is a vertical section transversely through the upper part of the window, looking toward the left jamb, with the upper sash dropped a few inches;

Fig. 5 is a vertical transverse section through the meeting rails and looking toward the left jamb, which may be considered as taken on the line 5 5 0f Fig. 1;

Fig. 6 is a perspective view of the left parting stop and its weather stripping; and

Fig, 7 is a transverse vertical section of the window taken along the line 'I-1 of Fig. 1 at the inner surface of the left j amb and looking toward the right jamb, with the upper sash in lowered position.

Referring to the drawings, the Window to which my weather stripping is applied may be of a conventional design of wooden frame and doublehung wooden sash.

The upper and outer sash Il] and the lower and inner sash II slide up and down in their respective channel-shaped ways at each jamb I2, which ways are partitioned by parting stops I3. Each parting stop I3 is recessed into a parting stop groove I4 in the side jamb. The outer and inner faces of the protruding portion of the parting stop are cut back to provide room for the Weather stripping. Thus, the parting stop is given a T-shaped cross-section, the head of the T being recessed into the jamb and the stem disposed between adjacent margins of the sash.

As shown in Fig. 3, the weather stripping at the parting stop consists of three pieces: an upper sash-carried strip I5, a lower sash-carried weather strip I6, and an intermediate stop-carried weather strip I'l. The stop-carried weather strip I1 may be described as NI shaped, oras a channel vcomprising a web I3 and legs I9 having outwardly returned anges 20 parallel to, and rather closely spaced to, the legs Id. The chan,- nel of the stop-carried strip I1 snugly straddles the protruding `stem of the T-shaped parting stop I3. As the stop-carried strip II is manufactured, the legs I9 are predisposed to converge opposite the web I8 so that when the strip is applied to straddle the stop, the legs I9 will. snugly press against the sides of the stop.

The sash-carried strips I5 and IB are identical in cross-section and cut from the same stock, but in application one is mounted to be the reverse of the other. The sash-carried strips I5 and I6 are more or less S-shaped in cross-section. Each may be considered as a channel having a web 2|, a short far leg 22a long near leg 23, and a returned flange 24 on the leg 23. The space between the ange 24 and leg 23 is substantially the same as the space between the leg I9 and ange 20 of the stop-carried strip. This spacing is about twice the thickness of the sheet metal stockemployed for the strips. The sashcarried strips are interhooked with the stopcarried strip as shown in Fig. 3 so that the flange 24 of the sash-carried strip lies within the inwardly opening deep but narrow slot between the leg I9 and returned flange 20 at .the adjacent side of the stop-carried strip Il, while the returned'flange 20 `of the stop-carriedV strip lies in the similar narrow but notr quite so deep outwardly opening slot formed between the leg 23 and returned ange 2li of the sash-carried strip. The terminal margins of the returned flanges 2B and 2li are preferably in turn rebent upon themselves, as shown at 2te and 24a, to reinforce the margins, to give greater thickness for more convenient sealing contact with the walls of the slots which they enter, and to aord rounded margins complementing the semicircular `contours at the closed ends of the slots to facilitate end sealing and to avoid excessive friction or cutting by raw edges as the sash-carried strips are vertically reciprocated relative to the stop-carried strip.

Although, for the sake of clarity, Fig. 3 shows the cross-sections of the three strips somewhat idealistically with some spaces between portions, it can be appreciated that in practice the legs and anges are so formed that the walls of the channels and slots tend to converge toward their open ends to eiect a pinching action upon whatever occupies the channel or slot. Thus, the interengagement between each sash-carried strip and the stop-carried strip affords many Vertical lines or bands of sealing contact extending throughout the length of the sash-carried strip.

The sash-carried strips I5 and I6' are preferably mounted on the respective sash to slide up and down therewith without being formally attached thereto. For this purpose a narrow but deep kerf 25 is cut into the lateral edge face of each sash from its top to its bottom at a distance from the parting stoprface of the sash which corresponds to the space between the legs 22 and 23 of the sash-carried strips. .The kerf is ofA a depth as great as the Width of the leg 22. The leg `22 of each sash-carried strip is inserted into the kerf .25 of its sash, the web 2l lying against the edge face of the sash, an'd the leg 23 lying against the parting stop face of the sash.

Ther pinching effect of the channel of the sashcarried strip in straddling the square bead formed at the edge corner of the sashas a result of the kerf 25 causes the strip to grip the sash so that it does not slide relative to'the sash. The unattached anchorage of the Vsash-carried strip upon its sash is further implemented by an obliquely returned terminal flange26, on the leg 22 of each sash-carried strip,V which causes an expansivepinching of the walls of the kerf 25. The raw edge of the terminal` flange 26 will also dig into the far wall of the kerf 25 to prevent jamb-Ward movement of the sash-carried strip relative to the sash, and thus will hold the web 2| snugly against the edge face of the sash.

As previously mentioned, the stop-carried strip VI straddles the stem of the T-shaped parting stop I3. Thestrip II is not necessarily attached to the parting stop. But for convenience in handling the parting stop and its weather strip as a unit in assembling the window, I prefer to employ wood screws v2I- passing through the web I8 of the strip and into the parting stop-. For the smaller sizes of sash, two screws-one afew inches down from the top and the other a few inches up from the bottom-will suiiice; for larger sashA an intermediate screw may be advisable. f

As shown in Fig. 6, and indicated in Fig. 1, arched vertical leaf springs 28 are disposed in the space between the inner edge of the parting stop and the web I8 of the strip to urge the strip` inwardly away from the parting stop, the movement being limitedY by the heads of the screws 2'I- which are not pulled up tight. The leaf springs may be held in position byl nailing them to the parting-stop.

Because the leaf springs 28 urge the strip I1 end of the slot, which receives it in the sashcarried strip, and, as a corollary, tends to bring the free margin of the flange 24 of the sashcarried strip against the -end of the slot in the stop-carried strip which receives it. Another advantageous result of the spring action which necessarily follows from the inward pressure in forcing the weather strip web I 8 against the ends of the meeting rails of the sash, resides in the jambward pressure upon the unfastened parting stop I3 which maintains the stop in its grooved seat in the jarnb. This avoids looseness that vmight otherwise arise or be present in the stop inwardly, they cause the web I8 of the strip I1 I to press against the ends of the overlapping portions of the meeting rails of the sash as will be apparent from Fig. 5. This serves to preserve a sealV against air leakage at this difcult point, which gives trouble `in ordinary weather stripping. The pressure of the leaf springs 28 also tends to shift the free margin of each of the flanges 20 of the stop-carried strip into the,

due to shrinkage or other causes and which might be suihcient to let air through and thus nullify the weather-proofing advantages gained from the weather stripping.

Another form of weather strip, which constitutes the subject matter of my prior Patent No. 2,011,278, as shown at 2S in Fig. 4, is carried at the head jamb and co-operates with a groove 30 (Fig. '7) along the Ytop rail of the upper sash to seal the sash to the head jamb. A similar `weather strip 3| is employed at the meeting rails of the sash. That same type of weather strip may be used to seal the bottom of the lower sash in accordance with the disclosure of my previous patent.

One of the features of my vertical weather stripping is are facility with which the weather stripping may be installed in assembling the Window. Starting with the window frame installed in the building, the head parting stop 32 is set into its recess in the head jamb 33 (Fig. 4), but not nailed. Then the right-hand parting stop, carrying its Weather strip, is set into its groove in the right side jamb. The head parting stop 'is long enough to overlap the upper end of the side parting stop, and thisy is what holds the head jamb in place without nailing. As shown in Fig. 6 (which shows the leftv Darting stop), the upper en d of the stop-carried strip is cut so that all of the web and one leg and its flange terminate in the plane of the top edge of the stop. But the other leg and its dangeat the side which is to go toward the outdoorsextend thereabove by a distance approximating the height of the protruding portion of the head parting stop. i In the assembly step just mentioned, the projecting leg I9 of the strip rests against the outer face of the head parting stop whereby the weather stripping seal may be extended along the upper sash all of the way to the under face of the head jamb.

The next assembly step is to insert one of the weather strips |=5 along the right hand stile of the upper sash. Then the upper sash is set into the frame in such a `manner that its right-hand weather stripping is shifted toward the right into interlocking engagement with the weather strip carried by the right :parting stop. The upper sash is then swung into the plane of the window and lowered until its check rail rests on the sill. It will be understood that the inside stop 34, which is `preferably attached by screws, has not yet been installed.

The left-hand parting stop, together with its weather strip, is then set into the left side jamb with the ulpper end ofthe stop overlapped by theV head stop and the upwardly protruding leg and ange of the strip lying on the outside of the head stop. The stopsV are not attached to the frame. The upper sash now being installed in its way, but at its lower position, the left-hand weather strip for the upper sash is next installed. This is not applied to the sash sidewise and interengaged with the stop-carried weather strip by sidewise movement, as in the case of the right-hand strip for the upper sash. Instead, the left-hand sash carried strip is inserted endwise downwardly to mount it on the sash and to interlock it with the stop-carried weather strip. This operation can, in practice, most conveniently be effected by inserting the lower end of the strip an inch or so, and then, while holding the strip in vertical position, raising the upper sash to the top of the window which will telescope the strip into place.

As indicated in Fig. 7, the upper ends of the weather strips l carried by the upper sash have their webs and inner legs and anges cut short in much the same manner as the stop-carried strip in Fig. 6. This is to avoid overlapping the groove 39, which receives the head weather stripping 22.

The upper sash and its weather stripping now being fully installed, the bottom sash and the right and left lweather strips, which it carries, are installed in much the same way as were the upper sash. In the instance of the lower sash, where its left-hand weather strip is installed last, I form that weather strip in two sections-a long section Ita and a short section lSb thereabove. The two sections are inserted successively, and this avoids the complication of lack of adequate head room for the insertion of the strip.

The weather stripping 29 may be nailed into the head` stozp 32 before or after the head stop is positioned. The weather stripping 3| is applied at the meeting rails after the previously described assembly, and likewise the bottom horizontal weather stripping.

The inside stop 34 is screwed to the side jam'b, of course, after both sash are installed.

The horizontal weather stripping employed in my window-at the ia-mlb head, at the meeting rails, and at the sill-Which are in accordance with my prior patent, are nailed in place. But it will be noted that my new vertical weather stripping is not nailed or otherwise attached (except that, for convenience in handling on account of the inclusion of the leaf springsscrews are employed to hold the weather strips I1 to the strips and sash, between the stop-carried and sash-carried strips, and between the stop-carried stri-p and the stop.

Although I have illustrated and described this specific embodiment of my invention, I contemplate that many chan-ges and substitutions may be made without departing from the scope or spirit of my invention.

Iclaim:

In a double-hung sash window, a side jamb having an inwardly opening vertical groove extending substantially from top to bottom, a parting stop seated in the groove and partitioning parallel ways for the sash, sash having cooperating meeting rails, a weather strip of generally IVI-shape cross section extending substantially the length of the parting stop and having a central channel oatingly straddling the parting stop with the legs of the channel predisposed to converge opposite the web of the channel to press snugly against the sides of the parting stop, returned ilanges integral with, and spaced from, the legs of the channel forming inwardly opening deep and narrowslots parallel with the sides of the parting stop, weather strips substantially similar to each other `carried by the respective sash and each having a returned ange structure forming a narrow and relatively deep outwardly opening slot within which the respective adjacent returned flange of the stop-carried strip is received with the returned flange of the sashcarried strip received in interhooked relation within the associated slot formed by the cooperating returned ange off the stop-carried strip, all of these interhooked returned anges of the stop-carried and sash-carried strips being predisposed to converge toward the open ends of their respective slots whereby to provide, between such flanges and the walls of the slots which receive them, a `plurality of vertical lines of sealing contact extending throughout the length of the sashcarried strips, and spring means interposed between the web of the channel of the stop-carried strip and the opposing edge of the :parting stop urging the stop-carried strip inwardly away from the [panting stop to press such web against the ends of the meeting portions of the meeting rails of the sash to preserve a seal against air leakage ,between the stop and said meeting portions and to shift the returned anges of the stop-carried strip toward the bases of the respective slots of the sash-carried strips within which these flanges -are received, a longitudinally extending portion of the stop lying between the adjacent margins of the sash, and the spring means, by jambward pressure upon the stop, maintaining the stop in its grooved seat in the jamb.

ANTON A. GUILLAUME. 

